1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
use std::path::{Path, PathBuf};
use serde_derive::Serialize;
use cargo_metadata::{metadata_run, CargoOpt};
use ra_syntax::SmolStr;
use rustc_hash::{FxHashMap, FxHashSet};
use failure::{format_err, bail};
use crate::{
Result,
thread_watcher::{ThreadWatcher, Worker},
};
#[derive(Debug, Clone)]
pub struct CargoWorkspace {
packages: Vec<PackageData>,
targets: Vec<TargetData>,
}
#[derive(Clone, Copy, Debug, Serialize)]
pub struct Package(usize);
#[derive(Clone, Copy, Debug, Serialize)]
pub struct Target(usize);
#[derive(Debug, Clone)]
struct PackageData {
name: SmolStr,
manifest: PathBuf,
targets: Vec<Target>,
is_member: bool,
dependencies: Vec<Package>,
}
#[derive(Debug, Clone)]
struct TargetData {
pkg: Package,
name: SmolStr,
root: PathBuf,
kind: TargetKind,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum TargetKind {
Bin,
Lib,
Example,
Test,
Bench,
Other,
}
impl Package {
pub fn name(self, ws: &CargoWorkspace) -> &str {
ws.pkg(self).name.as_str()
}
pub fn root(self, ws: &CargoWorkspace) -> &Path {
ws.pkg(self).manifest.parent().unwrap()
}
pub fn targets<'a>(self, ws: &'a CargoWorkspace) -> impl Iterator<Item = Target> + 'a {
ws.pkg(self).targets.iter().cloned()
}
pub fn is_member(self, ws: &CargoWorkspace) -> bool {
ws.pkg(self).is_member
}
}
impl Target {
pub fn package(self, ws: &CargoWorkspace) -> Package {
ws.tgt(self).pkg
}
pub fn name(self, ws: &CargoWorkspace) -> &str {
ws.tgt(self).name.as_str()
}
pub fn root(self, ws: &CargoWorkspace) -> &Path {
ws.tgt(self).root.as_path()
}
pub fn kind(self, ws: &CargoWorkspace) -> TargetKind {
ws.tgt(self).kind
}
}
impl CargoWorkspace {
pub fn from_cargo_metadata(path: &Path) -> Result<CargoWorkspace> {
let cargo_toml = find_cargo_toml(path)?;
let meta = metadata_run(
Some(cargo_toml.as_path()),
true,
Some(CargoOpt::AllFeatures),
)
.map_err(|e| format_err!("cargo metadata failed: {}", e))?;
let mut pkg_by_id = FxHashMap::default();
let mut packages = Vec::new();
let mut targets = Vec::new();
let ws_members: FxHashSet<String> = meta
.workspace_members
.into_iter()
.map(|it| it.raw)
.collect();
for meta_pkg in meta.packages {
let pkg = Package(packages.len());
let is_member = ws_members.contains(&meta_pkg.id);
pkg_by_id.insert(meta_pkg.id.clone(), pkg);
let mut pkg_data = PackageData {
name: meta_pkg.name.into(),
manifest: PathBuf::from(meta_pkg.manifest_path),
targets: Vec::new(),
is_member,
dependencies: Vec::new(),
};
for meta_tgt in meta_pkg.targets {
let tgt = Target(targets.len());
targets.push(TargetData {
pkg,
name: meta_tgt.name.into(),
root: PathBuf::from(meta_tgt.src_path),
kind: TargetKind::new(meta_tgt.kind.as_slice()),
});
pkg_data.targets.push(tgt);
}
packages.push(pkg_data)
}
let resolve = meta.resolve.expect("metadata executed with deps");
for node in resolve.nodes {
let source = pkg_by_id[&node.id];
for id in node.dependencies {
let target = pkg_by_id[&id];
packages[source.0].dependencies.push(target);
}
}
Ok(CargoWorkspace { packages, targets })
}
pub fn packages<'a>(&'a self) -> impl Iterator<Item = Package> + 'a {
(0..self.packages.len()).map(Package)
}
pub fn target_by_root(&self, root: &Path) -> Option<Target> {
self.packages()
.filter_map(|pkg| pkg.targets(self).find(|it| it.root(self) == root))
.next()
}
fn pkg(&self, pkg: Package) -> &PackageData {
&self.packages[pkg.0]
}
fn tgt(&self, tgt: Target) -> &TargetData {
&self.targets[tgt.0]
}
}
fn find_cargo_toml(path: &Path) -> Result<PathBuf> {
if path.ends_with("Cargo.toml") {
return Ok(path.to_path_buf());
}
let mut curr = Some(path);
while let Some(path) = curr {
let candidate = path.join("Cargo.toml");
if candidate.exists() {
return Ok(candidate);
}
curr = path.parent();
}
bail!("can't find Cargo.toml at {}", path.display())
}
impl TargetKind {
fn new(kinds: &[String]) -> TargetKind {
for kind in kinds {
return match kind.as_str() {
"bin" => TargetKind::Bin,
"test" => TargetKind::Test,
"bench" => TargetKind::Bench,
"example" => TargetKind::Example,
_ if kind.contains("lib") => TargetKind::Lib,
_ => continue,
};
}
TargetKind::Other
}
}
pub fn workspace_loader() -> (Worker<PathBuf, Result<CargoWorkspace>>, ThreadWatcher) {
Worker::<PathBuf, Result<CargoWorkspace>>::spawn(
"workspace loader",
1,
|input_receiver, output_sender| {
input_receiver
.map(|path| CargoWorkspace::from_cargo_metadata(path.as_path()))
.for_each(|it| output_sender.send(it))
},
)
}
|
